浙江至德鋼業有限公司銷售人員認為，影響不銹鋼管價格的因素除了品牌、材質和生產工藝以外，最重要因素是不(bu)銹鋼(gang)管(guan)表面處理方法。為進一步改善管道材料特性，對管道內外表面進行處理 般有四種方法：酸洗鈍化（AP）、機械拋光（MP）、光亮退火（BA）和電解拋光（EP）處理工藝。試驗資料和實踐都證明，通過表面處理后，管道材料的粗糙度減小，表面吸附性減弱。那么AP、MP、BP、EP級不銹鋼管的區別在哪？

AP（Acid Pickling）酸洗(xi)處理(li)

  不銹鋼的耐腐蝕能力主要來源于其內含的鉻元素與氧氣發生反應后在其表面形成一層致密的防護層。而酸洗的作用就是讓其提前發生這種反應，以提高不銹鋼管的耐腐蝕能力，酸洗過程中會去除管材表面所附著的油污及其他在生產中所沾染的其他物質。管道內外表面較粗糙易有懸浮雜質附著。

MP（Mechanical polishing）機(ji)械拋光

  拋(pao)(pao)光(guang)輪或拋(pao)(pao)光(guang)帶借助拋(pao)(pao)光(guang)劑中的(de)磨料(liao)(liao)對不銹鋼(gang)管表(biao)(biao)面進(jin)行拋(pao)(pao)磨加工(gong)，促使不銹鋼(gang)管面達到平滑拋(pao)(pao)光(guang)效果。其亮度與效果則取決于(yu)加工(gong)方(fang)式(shi)的(de)種類(lei)。另(ling)外機械拋(pao)(pao)光(guang)后雖較(jiao)美觀但也會降低抗蝕性，所以(yi)當用在(zai)腐蝕環境下(xia)需再經(jing)過鈍化處理，且鋼(gang)管表(biao)(biao)面常有拋(pao)(pao)光(guang)材(cai)料(liao)(liao)殘留。

  The polishing wheel or polishing belt uses the abrasive in the polishing agent to polish the surface of the stainless steel tube to promote the smooth polishing effect of the stainless steel tube surface.Its brightness and effect depend on the type of processing method.In addition，although it is more beautiful after mechanical polishing，it will also reduce the corrosion resistance，so when it is used in a corrosive environment，it needs to be passivated again，and there are often polishing materials left on the surface of the steel pipe.

BA（Bright Annealing）光亮退火

  不銹鋼(gang)(gang)管(guan)在制造(zao)過程中，用(yong)于潤滑的(de)油脂晶粒也(ye)會(hui)因(yin)加工而(er)變形，為了避免(mian)油脂殘留在鋼(gang)(gang)管(guan)中，在退(tui)火(huo)時利用(yong)高溫以氫氣(qi)充(chong)當(dang)爐內氣(qi)氛，借由氫氣(qi)與鋼(gang)(gang)管(guan)表(biao)(biao)面(mian)(mian)(mian)的(de)碳氧結合(he)燃燒，進一步清潔鋼(gang)(gang)管(guan)的(de)表(biao)(biao)面(mian)(mian)(mian)產生(sheng)亮(liang)面(mian)(mian)(mian)效(xiao)果，這種利用(yong)純氫氣(qi)退(tui)火(huo)加熱(re)并快速冷卻，以亮(liang)化(hua)光面(mian)(mian)(mian)的(de)方(fang)式叫(jiao)光輝(hui)退(tui)火(huo)。雖然利用(yong)此種方(fang)式來(lai)(lai)亮(liang)化(hua)表(biao)(biao)面(mian)(mian)(mian)可保鋼(gang)(gang)管(guan)充(chong)分干凈無任何(he)外來(lai)(lai)污染。但這種表(biao)(biao)面(mian)(mian)(mian)的(de)明亮(liang)度若(ruo)與其他拋(pao)光方(fang)式相較機械、化(hua)學、電解會(hui)有霧面(mian)(mian)(mian)的(de)感覺。當(dang)然其效(xiao)果也(ye)與氫氣(qi)的(de)含量與加熱(re)的(de)次數有關。

  During the manufacturing process of the steel pipe，the grease grains used for lubrication will also be deformed due to processing.In order to avoid the grease remaining in the steel pipe，argon gas is used as the furnace atmosphere at high temperature during annealing.Oxygen combined combustion further cleans the surface of the steel pipe to produce a bright surface effect.This kind of annealing and heating with pure argon gas is called bright annealing in the way of brightening the surface.Although using this method to brighten the surface can keep the steel pipe sufficiently clean without any external pollution.However，if the brightness of this surface is mechanical，chemical，or electrolytic compared to other polishing methods，it will feel matte.Of course，the effect is also related to the content of argon gas and the number of heating times.

EP（Electro Polishing）電(dian)解光

 電(dian)解拋(pao)(pao)光是利(li)用陽極處理的(de)(de)(de)(de)方式，借由電(dian)化(hua)學(xue)的(de)(de)(de)(de)原理，適(shi)當(dang)地調(diao)整電(dian)壓、電(dian)流、酸液組成、以(yi)及拋(pao)(pao)光時間，不但可(ke)以(yi)使表(biao)面(mian)達到明(ming)亮(liang)、順(shun)滑(hua)、潔凈的(de)(de)(de)(de)效(xiao)果，更可(ke)以(yi)提升表(biao)面(mian)的(de)(de)(de)(de)抗腐(fu)蝕性，所以(yi)是最佳(jia)的(de)(de)(de)(de)亮(liang)化(hua)表(biao)面(mian)的(de)(de)(de)(de)方法，當(dang)然(ran)其成本和技術(shu)也相(xiang)應的(de)(de)(de)(de)提高不少。

 不(bu)過，因為電解拋光(guang)會凸顯鋼管(guan)表(biao)面(mian)(mian)(mian)的原始狀(zhuang)態，所以若鋼管(guan)表(biao)面(mian)(mian)(mian)有(you)(you)嚴重刮傷(shang)、孔洞，或是夾渣、析(xi)出物等，皆可能造(zao)成電解失(shi)敗。其與化學拋光(guang)不(bu)同(tong)之處(chu)是，雖然也是在酸性環境中進行，但(dan)鋼管(guan)表(biao)面(mian)(mian)(mian)不(bu)但(dan)不(bu)會有(you)(you)任(ren)何晶界腐(fu)蝕現象，可經由控制表(biao)面(mian)(mian)(mian)的氧化銘膜層厚度，使鋼管(guan)達到的抗蝕性。

 However，because the electrolytic polishing will highlight the original state of the surface of the steel pipe，if the surface of the steel pipe has serious scratches，holes，or slag，precipitates，etc.，it may cause electrolytic failure.

 The difference between it and chemical polishing is that although it is also carried out in an acidic environment，the surface of the steel pipe will not have any grain boundary corrosion，and the corrosion resistance of the steel pipe can be achieved by controlling the thickness of the chromium oxide film on the surface.

這(zhe)篇(pian)文章主要(yao)給大家講解(jie)什么是(shi)AP級(ji)(ji)(ji)(ji)、MP級(ji)(ji)(ji)(ji)、BA級(ji)(ji)(ji)(ji)、EP級(ji)(ji)(ji)(ji)不(bu)銹鋼管，AP級(ji)(ji)(ji)(ji)、MP級(ji)(ji)(ji)(ji)、BA級(ji)(ji)(ji)(ji)、EP級(ji)(ji)(ji)(ji)不(bu)銹鋼管各種區別和等級(ji)(ji)(ji)(ji)要(yao)求。希望(wang)對大家有所(suo)幫助，有關這(zhe)方問(wen)題，可以隨時(shi)來(lai)電咨詢。